1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 426Get this manual
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Figure 12 Remov ng Crankshaft Gear
Figure 13 Installing Crankshaft Gear
5A-28EN NE
Page: 426
Mercruiser Service Manual 1963-1973 all Engines and driveswww.